java - 以前的字符实例不会被删除

问题描述

这就像如果你在一个镜子迷宫中，你可能很难找到自己的一个特定反射。所以你会对自己有多重反映，当你试图找到对自己的直接反映时，你会感到困惑。

可悲的是我无法发布图片............所以......

字符是“C”

它从

至

抄送

当我试图向右移动时。

package WASD;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.*;

public class WASD extends JFrame implements KeyListener, ActionListener{
    private int playerX = 400;
    private int playerY = 400;
    int C = 1;
    private int RESTART = 0; // Three ENTER = Restart
    private Timer timer;
    JFrame j = new JFrame();
    private int previousX = -50;
    private int previousY = -50;
    public WASD() {
        JPanel panel = new JPanel();
        setTitle("Not supposed to be a painting program.");
        setSize(2000, 2000);

        timer = new Timer(8, this);

        this.getContentPane().add(panel);

        addKeyListener(this);
        setVisible(true);
        setFocusable(true);
        setFocusTraversalKeysEnabled(false);

        setDefaultCloseOperation(EXIT_ON_CLOSE);

    }
    public static void main(String[] args){
        WASD W = new WASD();
    }
    public void paint(Graphics g) { //TODO paint is only working once, then failing forever.
        //////////////////////////
        g.setColor(Color.BLACK);
        g.drawRect(0, 0, 3000, 3000); // Background


        if(C == 1) g.setColor(Color.RED);

        else if (C == 2) g.setColor(Color.BLUE);
        else if (C == 3) g.setColor(Color.GREEN);
        else if (C == 4) g.setColor(Color.YELLOW);
        else if(C>4){
            g.setColor(Color.GRAY); 
            try {
                Thread.sleep(1000); //Gray pauses for a second I guess...
            } 
            catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            C = 1;
        }
        g.fillRect(playerX, playerY, 50, 50); // Player/
        g.setColor(Color.BLACK);
        g.fillRect(previousX, previousY, 50, 50);
        g.dispose(); //Last thing
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        timer.start();
        repaint();
    }
    @Override
    public void keyPressed(KeyEvent K) {
        // TODO Auto-generated method stub
        int e = K.getKeyCode();

        repaint();  //timer.start(); does not affect this. g.dispose() is unavailable.
    /*
    If this repaint is used, then the previous locations 
    that the player was at will be painted as well.
    Basically, instead of moving, all instances 
    made will not be deleted. #PaintingApplication

    However, if it is not used, then the CHARACTER will not move at all.

    It seems that the problem is not about 

    playerX, or playerY, 

    instead, it is about the program not refreshing.
    */
        if((e == KeyEvent.VK_RIGHT || e == KeyEvent.VK_D) && playerX<2000){
            playerX += 200;
        }
        else if((e == KeyEvent.VK_LEFT || e == KeyEvent.VK_A) && playerX>0){
            playerX -= 200;
        }
        else if((e == KeyEvent.VK_UP || e == KeyEvent.VK_W) && playerY>0){
            playerY -= 200;
        }
        else if(e == KeyEvent.VK_DOWN || e == KeyEvent.VK_S && playerY<2000){ // Easter egg bug 1
            playerY += 200;
        }
        else if (e == KeyEvent.VK_C){
            C++;
        }

        else if(e == KeyEvent.VK_ENTER){
            if(RESTART == 3){
                playerX = 400;
                playerY = 400;
                RESTART = 0; //TODO
                repaint();
            }
            else{
                RESTART++;
            }
        }
        else{
            RESTART = 0;
        }

    }

    @Override public void keyTyped(KeyEvent arg0) {}
    @Override public void keyReleased(KeyEvent arg0) {}
}

标签： javajframekeylistener

java - 以前的字符实例不会被删除

问题描述

解决方案

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